Extreme events such as natural disasters can cause power grid failures, leading to catastrophic consequences and losses. With increasing integrations of photovoltaics (PVs) and energy storage in the distribution power grid, this work explores how to optimally utilize these distributed energy resources (DERs) to improve the operation efficiency and enhance power grid resilience. Improvement in resilience is obtained by incorporating both mobile and/or stationary battery storage systems along with solar power. The implementation of these two factors allow a system to become more responsive during disaster or unforeseen scenarios. Firstly, an optimization model was proposed for optimal scheduling and control of PVs and energy storage in distribution power grids to improve the operational efficiency. Secondly, this work exploited electric vehicles (EVs) as a type of mobile energy storage to enhance the power grid resilience when unforeseen events or disasters occur. Optimal allocation of these resources are implemented and utilized to improve system resilience.